Pronged clinching finger hose coupling



Jam 3, 1939.

Filed Aug. 4, 1937 K P m f H m m E m Patented 3,1939

UNITED STATES PATENT ,OFFJICIE I r'RoNoEo cnmcnme. FINGER nose courmno IEmersonH; Tompkins,'Waterbury,Conn., assign- 1 or to ScovillManufacturingcompany, Waterbury, Conn a corporation of ConnecticutApplication August 4, 1937, Serial No. 151,432

. 1 Claim. (chases-84y The present invention relates .to'hosecouplings,and more particularly to aclincher structure for securing the couplingmembers to their respective hoseends. I a N I An object of the inventionis, to improve the types'of couplings which are exemplified. in theprior patents tb'jNelson 'No. 1,;179,452 granted April granted July '25,1933.

.Heretofore, the clinching [fingers which are struck or bent overagainst the outer side, of the hose havehad inwardly struck prongs, asshown prongszfrequently flatten back into their recesses V, in thefingers and do not bite intoflthe surface portion of the hose.Thecouplingmember may thus be easily pulled from the hose end.

Another 'diflicultyfl found in the prior art, as shownin the Reutter'etxal'. patent above' me tione,d,is that when the fingers are-ribbed attheir innerouter ends a smooth cam surface is provided which does notsatisfactorily hold the coupling member on the hose end, event whenrelatively thick strong fingers are j provided. The

only holding actionis a pinching one on the hose between the ribbednipple and the ribbed finger.

To overcome the above and other objections found in the prior art is anobject of this invention. To this end, thepresentinvention providesfingers with prongs thereonwhich are oflsetzi-nwardly on the fingerstosuch an extent that when the fingers are bentover on the hose the prongsare engaged down into the hose body to a considerable depth at the pointofi'compression of the hose body, leaving the, end portion of the hosefree to expand behind the prongs and providea relatively thick deep bodyportion of the hose for the prongs to work againstx'f'i'he inventionalso provides a construction which com-presses the hose fat the point ofengagement of the prongs and which prevents damage to the hose by theprongs and ofi setsany tendency for the prongs to shift in an edgewisedirection to cut the hose body.

With the foregoing andother objects in View,

I the invention-willbe more fully-described hereinafter, and will bemore particularly pointed out in the claim appended hereto. 1 v

18, 1916,and toReutter et a1. No. 1,919,860 7 In the drawing, whereinlike symbols refer to like or corresponding partsthroughout, the several views. I r a Figure I is a side elevation of a hose coupling havingthemembers thereof secured to their hose ends by the clincher structureof this invention.

Figure 2 is a detail inner face view of the finger carrying disc,showing the ribbed fingers with the prongs thereon.

Figure 3 is an opposite face view of the same.

Figure 4 is a fragmentary sectional view of a coupling member secured inthe hoseend by the clincher structure "of this invention, the dottedlines showing the initial position of one of the fingers prior tobending into clinching position.

Figure 5 is an enlarged fragmentary section taken on the line 5--5 ofFigure 2 showing an edge view of one of the clinching fingers.

Figure 6 is a like view, but showing the finger in section on the line6-6 of Figure 3, and

Figure? isa detail enlarged outer end view of one ofthe clincherfingers, showing .thebulged base portion ofthe prong thereof.

Referring now to the drawing, Figurel shows a common type of hose,coupling having a threaded hollow ,plugllfl on one coupling member and afreely turning coupling nut l I on the other mem-.

her, the nut adapted to be screwed over the plug Ill to interconnect'thehose ends 12.

1 Both of the coupling members I0 and II are secured to their respectivehose ends by the improved clincher structure of this invention.

With particular reference to Figure 4. each coupling member, such as theplug 10, is con nected to the outer'end of anipple I3 adapted I -forinsertion in the end of ahose l2. The inner :or crimps l5 outstandingabout the outer end of *the nipple and receiving therebetween theinturned end of the plug ID as shown, 1 Also secured between the flanges15, and preferably against the inner end of theplug I0, is a clincherdisc or flat ring 16. The extremity oi the hose I2 is adapted to abutagainst the disc l6 and against and over the adjacent flange l5 toinsure a tight joint and sealing of the hose end on the coupling member.

Radially disposed about the outer marginal edge of the disciii are aplurality of clinching fingers ll which, initially, areinclined at aslight angle backwardly over the nippleI3. The fingers I1 are adapted tobe hammered, or' otherwise bent, inwardly about and against the end ofthe hose I2. As clearly shown in Figure 4, the fingers are of a lengthless than the distance between the disc I6 and the shoulder I4 on thenipple, the difference in length being such that when the fingers I1 arebent down the space between the ends of the fingers I! and shoulder I4is less than the thickness of the house I2 soas to compress the hoseforwardly of and against the shoulder and force the hose snugly abouttheintermediate portion of the nipple,

The outer ends of the fingers I! are transverse.- ly crimped to providea transverse bead I8 across the inner side of each finger. The beads I8,

vwhenl the fingers II are bent inwardly against the hose I2, are adaptedto be embedded in the surface portion of the hose and further compress Ithe latter and provide rounded non-cutting shoulders against which thefree end of the hose may expand for holding the end of the hose betweenthe fingers; The. beads I8 effect the localized deformationiandcompression of the hose over and against; the bead of the nipple.

Itha'sbeen found; however, due to the rounded surface of the beads I8and the flexibility of the hose, that the hose end works out frombeneath the fingers and thecoupling member'pulls too easily from thehose end.

To offset this difficulty and at the same time prevent damage to thehose itself, the beads I8 of the fingers I! are each provided with aprong I9 which is cut, stamped or struck from the bead I8 lengthwise ofthe finger and with its free end directed toward the finger carryingdisc I8. As clearly shown in Figures 5, 6 and 7, the base of the prongI9 is pressed or bulged inwardly from the bead I8 and is of less widththan that of the bead so as to present a rounded projection forembedding in the compressed surface portion of the hose to preventlateral shifting of the bead I8 on the hose and the cutting of the hosebeneath the bead. The extremity of the prong I9 diverges from the shankof the arm I1 sufficiently to penetratethe surface portion of the hoseat a point radially inward of the bead and at a substantial depth in theexpanded hose end. The prong I9 thus has a firm purchase against thethick expanded end of the hose and the prong cannot ,be torn through thebody portion of the hose. The prong I9 is of less width than that of thebead I8 so that the latter bears against the expanded hose end andprevents splitting and tearing'thereof-by the prong. 1

While the above description has set forth the improved clincherstructure in connection with one type of coupling member I0, it is ofcourse to be understood that the nipple I 3 with the clincher discl-6and its arms I1 may be connected to the inner end of any other suitabletype of coupling member, such as the coupling nut I I. t

The coupling members are manufactured independently of the hose I2, andin their initial form, the arms I1 extend outwardly at an overhangingangle as shown in Figures 4, 5 and 6. The nipple I3 is driven into theout or open end of the hose I2 to its fullest extent, until the. extremity of the hose abuts the disc I6. In this the full line positionshown in Figure 4. Uuring J the bending inwardly of the arms, the spursl9 penetrate the outer portion of the hose I2 and the portion of thehose l2 adjacent the spurs I9 is compressed not only by the transverseribs or beads I8 but also by. the bulged base portions of the spurs I9.The free ends of the arms I1, carrying the transverse ribs I8 and thespurs I9, are forced into the hose end I2 outwardly. of the zone of therib I4 of the nipple so thatthe hose I2 is compressed and deformed overand about the rib I4 and between the latter and the ribs 18 of the arms.

The important feature of this invention is that the spurs I9 are spacedradially inwar'da considerable 'distance from the arms Il s that thespurs are embedded deeply into the-- 'body"por I tion of the hose I2,and the free end of the hose is permitted to expand against the innersides of the arms I! and provide an annular relatively thick and solidbody portion of the hose for the spurs to workagainst. Thus, the spursI9 cannot easily cut through or disrupt the surface por tion of the hosewhen axial strain is'imposed through the coupling and hose. The spurs I9are also embedded in.a firm solid portion of the hose incident to theproximity of the transverse beads I8 and the bulged base portions of thespurs. The clincher action upon the hose is thus asolid one and the hoseis firmly held to the'nipple I3 and is deformed substantially to theexterior configuration thereof. V

It is obvious that various changes and modifications may be made in thedetails of construction and designof, theabove specificallydescribedembodiment of this invention without departing from thespiritthere'of; such changes and modifications being restrictedonlyibythe' scope'of the following claim. fl

What is claimed is: Q

In a clincher hose, coupling, a nipple adapted for insertion in the endof a hose and provided with an annular bead upon its inner end adaptedto be embedded in the inner wall of the hose,. a

clincher disc mounted on theouter portion of the hose, the constructionand arrangement being such that as'the spurs and ribs are forced intoengagement with the hose the hose is forced into contact with the discand distorted to fill the space between the nipple and the arms.

, EMERSON H. TOMPKINS,

